CN115000138A - Display module, preparation method thereof and electronic equipment - Google Patents

Abstract

The present disclosure provides a display module, a manufacturing method thereof and an electronic device, wherein the display module comprises: a substrate including a plurality of pixel regions and a wiring region; a thin film transistor layer; the OLED layer comprises light emitting units which correspond to the pixel regions one by one; the touch control induction layer comprises a signal transmission line, a first insulating layer and a touch control signal line; the signal transmission line at least comprises a first graph routing line, and the first graph routing line is communicated with the cathodes of all the light-emitting units. According to the display module, the touch sensing layer is sunk and adjusted by adjusting the film layer structure of the display module, and the first graphic wiring formed by the transmission signal line is used as the signal input wiring of the cathode of the light-emitting unit, so that the overall thickness of the display module is reduced, and the cost is saved; and the working procedure of the touch sensing layer is improved before the luminescent material is manufactured, so that the performance of the touch sensing layer film is improved, and the quality of the display module is improved.

Description

A display module and preparation method thereof, and electronic equipment

technical field

The present disclosure relates to the field of display technology, and in particular, to a display module, a preparation method thereof, and an electronic device.

Background technique

As the technology of organic light-emitting diode (OLED, Organic Light-Emitting Diode) panels gradually matures, the differences in design and display effects of different OLED display products are being greatly reduced, which in turn puts forward higher requirements for product cost control and product performance. requirements.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present disclosure is to provide a display module, a preparation method thereof, and an electronic device, so as to solve the problems in the prior art that higher requirements are placed on product cost control and product performance.

The embodiments of the present disclosure adopt the following technical solutions: a display module includes: a substrate, the substrate includes a plurality of pixel regions arranged in an array and a wiring region for dividing the pixel regions; a thin film transistor layer on the side surface; an OLED layer disposed on the side of the thin film transistor layer away from the substrate, and the OLED layer includes light-emitting units corresponding to the pixel regions one-to-one; disposed on the OLED layer away from all The touch sensing layer on one side of the thin film transistor layer, the orthographic projection of the touch sensing layer in the first direction is completely covered by the orthographic projection of the wiring area in the first direction, and the first direction is The direction perpendicular to the surface of the substrate; wherein, the touch sensing layer at least includes a signal transmission line, a first insulating layer and a touch signal line sequentially arranged on the OLED layer; the signal transmission line at least includes a first pattern A wiring, the first pattern wiring is communicated with the cathodes of all the light-emitting units.

In some embodiments, the touch signal line includes a plurality of touch electrode regions arranged in an array, and each of the touch electrode regions includes one or more adjacent pixel regions.

In some embodiments, the signal transmission line further includes a second pattern line, the second pattern line and the first pattern line do not have overlapping lines, and the second pattern line and the first pattern line do not have overlapping lines. The cathodes of any one of the light-emitting units are not connected; a bridge hole is opened in the area corresponding to the first insulating layer and the second pattern wiring, which are located in two adjacent touch electrode areas in the same column The touch signal lines therebetween are connected to the second pattern wirings based on the bridge holes, so as to realize signal transmission between the adjacent touch electrode regions.

In some embodiments, the touch sensing layer further includes a second insulating layer, and the second insulating layer is disposed on a side of the touch signal line away from the first insulating layer.

In some embodiments, a support structure is provided at a predetermined position on a surface of the second insulating layer away from the touch signal line, and the distance between the adjacent predetermined positions is greater than or equal to a predetermined distance .

In some embodiments, the method further includes: a flat layer and an encapsulation protection layer disposed on a side of the touch sensing layer away from the OLED layer.

Embodiments of the present disclosure also provide a method for preparing a display module, which is used to prepare the above-mentioned display module. The preparation method is implemented based on the following steps: preparing a thin film transistor layer on a surface of a substrate, wherein the substrate includes multiple A pixel area arranged in an array and a wiring area for dividing the pixel area; the anode layer, pixel definition layer and barrier layer of each light-emitting unit in the OLED layer are prepared on the side of the thin film transistor layer away from the substrate. The light-emitting units are in one-to-one correspondence with the pixel regions, and the pixel definition layer has an opening at a position corresponding to the pixel region; a touch sensing layer is prepared on the side of the barrier layer away from the thin film transistor layer, and the touch sensing layer is formed. The orthographic projection of the control sensing layer in the first direction is completely covered by the orthographic projection of the wiring area in the first direction, and the first direction is a direction perpendicular to the surface of the substrate, wherein the touch control The sensing layer at least includes a signal transmission line, a first insulating layer and a touch signal line that are sequentially arranged on the OLED layer, and the signal transmission line at least includes a first pattern wiring; all the barrier layers corresponding to the pixel regions are etched away , and prepare a light-emitting layer and a cathode layer in sequence on the side of the anode layer far from the thin film transistor layer in all the pixel regions, so that all the cathode layers are connected to the first pattern wiring.

In some embodiments, the touch signal line includes a plurality of touch electrode regions arranged in an array, and each of the touch electrode regions includes one or more adjacent pixel regions; the Forming the touch sensing layer on the side of the pixel definition layer away from the thin film transistor layer includes: preparing the signal transmission line with a second pattern wiring, the second pattern wiring and the first pattern wiring There is no overlapping wiring between, and the second pattern wiring is not connected to the cathode of any one of the light-emitting units; a bridge is provided in the area corresponding to the first insulating layer and the second pattern wiring holes, so that the touch signal lines located between two adjacent touch electrode regions in the same column are connected to the second pattern lines based on the bridge holes.

In some embodiments, the forming the touch sensing layer on the side of the pixel definition layer away from the thin film transistor layer includes: forming a second touch signal line on the side of the touch signal line away from the first insulating layer An insulating layer is provided, and a support structure is provided at a preset position of a surface of the second insulating layer away from the touch signal line, and the distance between the adjacent preset positions is greater than or equal to a preset distance.

In some embodiments, the method further includes: preparing a flat layer and an encapsulation protection layer on a side of the touch sensing layer away from the OLED layer.

An embodiment of the present disclosure also provides an electronic device, which at least includes the above-mentioned display module.

The beneficial effects of the embodiments of the present disclosure are: by adjusting the film layer structure of the display module, the position of the touch sensing layer is adjusted to sink toward the substrate side, and the first touch sensing layer formed by the transmission signal lines is used. The graphic trace is used as the signal input trace of the cathode of the OLED light-emitting unit, which reduces the overall thickness of the display module and saves the cost of the product; and in the preparation process, the preparation process of the touch sensing layer is transferred to the production of the light-emitting material of the light-emitting unit. Previously, the film performance of the touch sensing layer was improved during the preparation process, so that the quality of the display module could be improved while the preparation materials and processes were unchanged.

Description of drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments described in the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic cross-sectional view of a display module in the prior art;

2 is a schematic cross-sectional view of a level of a display module in the first embodiment of the disclosure;

3 is a schematic diagram of the arrangement of the signal transmission line in the first embodiment of the present disclosure;

FIG. 4 is a schematic diagram of the arrangement of the touch electrode area in the first embodiment of the disclosure;

5 is a schematic cross-sectional view of a level of a bridge region in the first embodiment of the disclosure;

6 is a schematic cross-sectional view of the support structure in the first embodiment of the disclosure;

FIG. 7 is a flowchart of a method for manufacturing a display module according to a second embodiment of the present disclosure.

Detailed ways

Various aspects and features of the present disclosure are described herein with reference to the accompanying drawings.

It should be understood that various modifications may be made to the embodiments claimed herein. Therefore, the above description should not be regarded as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of this disclosure.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure. principle.

These and other features of the present disclosure will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the accompanying drawings.

It should also be understood that although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalents of the present disclosure with certainty, which have the characteristics of the claims and are therefore located within the limits defined herein. within the scope of protection.

The above and other aspects, features and advantages of the present disclosure will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present disclosure are hereinafter described with reference to the accompanying drawings; however, it is to be understood that the claimed embodiments are merely examples of the present disclosure, which may be embodied in various ways. Well-known and/or repeated functions and constructions have not been described in detail to avoid obscuring the present disclosure with unnecessary or redundant detail. Therefore, specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis for the claims and a representative basis for teaching one skilled in the art to variously employ the present invention in substantially any suitable detailed structure. public.

This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may all refer to the same in accordance with the present disclosure or one or more of different embodiments.

As the technology of OLED panels gradually matures, the differences in design and display effects of different OLED display products are greatly reduced, which in turn puts forward higher requirements for product cost control and product performance. FIG. 1 shows a schematic cross-sectional view of a level of a display module of an OLED display product in the prior art. From bottom to top, it is a substrate and a thin film transistor (TFT) layer for light emission control, including but not limited to those shown in the figure. The source and drain (SD2), insulating layer (PLN2), etc.; SD2 is connected to the anode (anode) of the light-emitting unit, and the anode is controlled by TFT. The anode is provided with a light-emitting (EL) material and a cathode layer. Light emission is realized under control. The HPDL layer is the pixel definition layer. The pixel area is reflected by the openings on the HPDL layer, and other traces can be arranged in the unopened positions. The CVD1, IJP and CVD2 layers are used as packaging, flat and insulating layers. and other functional layers are arranged on the surface of the cathode layer of the light-emitting unit in turn, and a PS layer is also arranged on the surface of the HPDL layer at a specific position, which is mainly used as a support structure for the mask when the light-emitting layer and the cathode layer are fabricated; the light-emitting functional layer After a plane is formed on the upper surface, the functional layers related to Touch Sensor Panel (TSP) are fabricated on the surface of the barrier layer, including but not limited to TMB traces for touch signal transmission, and TMB traces in the bridge area. The TMA traces set by the wire jumpers, as well as the TLD layer and TOC layer for interlayer insulation and protection, can also be provided with other encapsulation protection layers, such as glass cover plates, which are not shown in FIG. 1 . In the prior art, the display module is preferentially fabricated at the relevant level of the light-emitting unit during fabrication, which leads to the subsequent fabrication of the TSP layer only by using a low-temperature process, resulting in an increase in the fabrication cost of the display module and the inability of the TSP film layer to perform. Give full play to it, so that the production cost increases and the product performance is poor.

In order to solve the above problems, the present embodiment provides a display module, the schematic diagram of its hierarchical cross-section is shown in FIG. 2 , and mainly includes the following hierarchical structure:

The substrate 10, that is, a substrate for carrying various levels of the display module, can be a glass substrate or a PI substrate, and its surface can be divided into a plurality of pixel areas arranged in an array and a wiring area for dividing each pixel area, The position corresponding to the pixel area is mainly used for fabricating the OLED light-emitting unit, and the position corresponding to the wiring area is mainly used for the layout of touch-related wirings.

A thin film transistor layer 20 is disposed on the surface of the substrate 10 (ie, the upper side of the substrate 10 in FIG. 2 ), and a plurality of thin film transistors TFT are correspondingly disposed in the thin film transistor layer 20 . The anode of the unit is connected, so that the light-emitting unit emits light by applying a voltage to the anode through the source or drain of the TFT. It should be noted that the hierarchical structure of the TFT is not fully shown in FIG. 2, but only the SD2 (ie source or drain) of the TFT and the insulating layers PLN1 and PLN2 in the TFT are shown. Similar to the prior art, this embodiment will not be described in detail here.

As shown in FIG. 2 , an OLED layer 30 is disposed on the side of the thin film transistor layer 20 away from the substrate 10 (ie, the upper side of the thin film transistor layer 20 in FIG. 2 ), which mainly includes a plurality of light-emitting units corresponding to the pixel areas one-to-one. , and through the control of the TFT, the light-emitting unit can emit light. Specifically, the light-emitting unit mainly includes an anode layer 31, a light-emitting layer 32 and a cathode layer 33 sequentially arranged on the surface of the thin film transistor layer 20, wherein, for a light-emitting unit, the anode layer 31 completely covers the corresponding pixel area, and the A pixel definition layer 34 is provided, and an opening is provided on the pixel definition layer 34, and the size of the pixel area is defined by the size of the opening, and the light-emitting layer 32 and the cathode layer 33 are fabricated at the corresponding opening.

Different from the structure of the prior art, in this embodiment, the related layers included in the touch sensing layer 40 (TSP) are not disposed on the surface of the encapsulated OLED layer 30 , but on the surface of the pixel definition layer 34 and the wiring area. Layer fabrication is performed at the corresponding position, that is, the orthographic projection of the touch sensing layer 40 in the first direction is completely covered by the orthographic projection of the wiring area in the first direction, and the first direction is a direction perpendicular to the substrate surface. Specifically, the touch sensing layer 40 at least includes a signal transmission line 41 , a first insulating layer 42 and a touch signal line 43 sequentially arranged on the surface of the OLED layer 30 , wherein the touch signal line 43 is mainly used to realize the touch function, The signal transmission line 41 is mainly used to transmit various signals. The pattern formed by the signal transmission line 41 in this embodiment includes at least the first pattern wiring 411 , and the first pattern wiring 411 is in communication with the cathode layers 33 of all light-emitting units in the OLED layer 30 , so as to emit light through the signal transmission line 41 . The cathode layer 33 of the unit inputs electrical signals to realize unified control of the cathode layers 33 of all light-emitting units, and uses TFT to input electrical signals to the anode layer 31 of the light-emitting unit that needs to emit light during actual operation to realize the light-emitting effect.

It should be understood that, during the specific preparation of the hierarchical structure of the display module provided in this embodiment, after the anode layer 31 and the pixel definition layer 24 are prepared, a barrier layer 50 should be prepared on the surface thereof to realize the pixel area and wiring. The full coverage of the area protects the anode material in the subsequent preparation process, and then prepares the relevant layers of the touch sensing layer 40, and prepares the signal transmission line 41 according to the position of the pixel area according to the first pattern wiring to form a cathode overlap circuit, after the other layers of the touch sensing layer 40 are prepared, the surface of the anode layer 31 and the corresponding material of the barrier layer 50 are etched away, and the light-emitting layer 32 and the cathode layer 33 are sequentially fabricated on the exposed surface of the anode layer, so that The cathode layer 33 is communicated with the transmission signal line 41 through the cathode bonding line of the reserved transmission signal line 41 .

FIG. 3 shows a schematic diagram of the arrangement of the signal transmission line 41 . As shown in FIG. 3 , each hexagonal grid represents a pixel area, and the solid line forming the pixel area corresponds to the first pattern line 411 presented by the signal transmission line 41 , and each pixel area is aligned with the first pattern line 411 . The line connection 411 realizes the connection of the cathodes of the light-emitting units in all pixel regions. In this embodiment, by adjusting the hierarchical structure of the display module, the related levels of the touch sensing layer 40 are adjusted downward, and wiring settings can be directly performed without prioritizing the preparation of the related hierarchical structure of the OLED package, thereby realizing the overall structural thickness of the display module. decrease. At the same time, due to the adjustment of the preparation process caused by the change of the level, the TSP film can be produced by high-temperature deposition prior to the preparation of the cathode layer and the light-emitting layer, so as to avoid affecting the deposition temperature of the TSP film due to the existence of the cathode layer and the light-emitting layer. , resulting in its performance degradation, unable to achieve its optimal characteristics.

Further, the touch signal line 43 is mainly used to realize the touch function of the display module. Combined with the setting of the pixel area, the touch signal line 43 is divided into a plurality of touch electrode areas 100 arranged in an array, as shown in FIG. 4 . As shown, for a single touch electrode area 100, it may only include an independent pixel area, or may include multiple adjacent pixel areas, and the touch electrode area 100 located in the same column is the power supply for touch signals The emitter (TX), the touch electrode region 100 in the same row is the receiver (RX) of the touch signal. Between two touch electrode regions 100 in the same row, the touch signal line 43 shared by the two adjacent pixel regions at the boundary can be used to realize signal transmission, while the two adjacent touch electrode regions in the same column are used for signal transmission. Between 100, direct connection cannot be achieved due to the horizontal RX pole setting. In order to solve the above problems, when the signal transmission line 41 is prepared in the display module in this embodiment, the second pattern wiring 412 is correspondingly formed in the bridge region 101 of the two adjacent touch electrode regions 100 in the same column. 3, and a bridge hole 421 is opened in the area corresponding to the first insulating layer 42 and the second pattern wiring 412, and the corresponding level cross-sectional schematic diagram is shown in FIG. 5, to realize the touch signal line 43 In the bridging area, the bridge hole 421 is used to connect with the second pattern wiring 412, and the second pattern wiring 412 is used to realize the jumper, so as to complete the connection of the touch electrode areas 100 in the same column. It should be noted that the second pattern wiring 412 in this embodiment is only used to realize the bridging function of the touch signal line 43, so it does not have any overlapping wiring with the first pattern wiring 411, nor is it connected with any The cathode of one light-emitting unit is connected, and the connection function of the touch signal line is realized only by the setting in the bridge area.

As shown in FIG. 2 , during the actual preparation of the touch sensing layer 40 , a second insulating layer 44 is further provided on the side of the touch signal line 43 away from the first insulating layer 42 , which is mainly used to realize the touch signal line 43 . Package protection. In some embodiments, in the process of preparing the light-emitting layer 32 and the cathode layer 33, it is necessary to use a mask to perform evaporation of the corresponding layered materials, and when setting the mask, it is necessary to use the existing layered structure. The design of the support structure is used to realize the support of the mask plate. In the prior art, an additional PS structure needs to be arranged on the HPDL layer to achieve the support effect, which further leads to an increase in the thickness of the display module level. In this embodiment, after the related structures of the touch sensing layer 40 are sunk, the second insulating layer 44 can be directly used to set the corresponding supporting structure 441 . As shown in FIG. 6 , the second insulating layer 44 is far away from the touch. A support structure 441 is fabricated at a predetermined position on one side surface of the signal line 43 (ie, the upper side of the second insulating layer 42 in FIG. 6 ), so that the thickness of the second insulating layer 44 at the predetermined position is greater than that of the second insulating layer 44 at other positions. Thickness of insulating layer 44 . Specifically, the preset position refers to the position where the support structure needs to be placed according to the actual preparation requirements and the design of the mask, which is usually set in the wiring area around the blue pixel, between adjacent preset positions The distance is greater than or equal to the preset distance. In general, the preset distance is the size of six pixels, that is, a support structure can be provided in the wiring area of the blue pixels every six pixels. It should be noted that the preset distance can be set according to the size of the display module, the resolution of the display module, the size of the mask, and the actual needs, as long as the corresponding support structure can realize the mask support function.

In actual implementation, as shown in FIG. 2 , the touch sensing layer 40 is further provided with a flat layer 60 and an encapsulation protection layer 70 on the side away from the OLED layer 30 , mainly for flattening the surface of the display module and encapsulation protection. In fact, based on the sunken design of the touch sensing layer 40 in this embodiment, the thickness of the original TOC layer in FIG. 1 is replaced by the flat layer 60 , and the TSP film layer is further realized by the setting of the support structure on the second insulating layer 44 The replacement of the PS layer makes the overall thickness of the display module of the present embodiment reduce the thickness of a group of TSP film layers compared to the display module shown in FIG. 1 , thereby reducing the size of the display module. The production cost of the product is reduced.

In this embodiment, by adjusting the film layer structure of the display module, the position of the touch sensing layer is adjusted downward to the substrate side, and the first pattern trace formed by the transmission signal line in the touch sensing layer is used as the OLED to emit light. The signal input wiring of the unit cathode reduces the overall thickness of the display module and saves the product cost; and in the preparation process, the preparation process of the touch sensing layer is carried out before the preparation of the light-emitting material of the light-emitting unit, and then in the preparation process The film performance of the touch sensing layer is improved in the middle, so that the quality of the display module can be improved without changing the preparation materials and process.

The second embodiment of the present disclosure provides a method for manufacturing a display module according to the first embodiment of the present disclosure, the flowchart of which is shown in FIG. 7 and mainly includes steps S10 to S40:

S10, a thin film transistor layer is prepared on a surface of a substrate, where the substrate includes a plurality of pixel regions arranged in an array and a wiring region for dividing the pixel regions. Specifically, the specific size of the wiring area and the pixel area can be set according to the size of the display module, resolution requirements, etc., and the preparation of the thin film transistor layer can also be directly performed by the prior art, which is not described in detail in this embodiment.

S20, preparing an anode layer, a pixel definition layer and a barrier layer of each light-emitting unit in the OLED layer on the side of the thin film transistor layer away from the substrate. The light-emitting unit corresponds to the pixel area one-to-one. After the pixel definition layer is prepared, an opening needs to be opened at the position corresponding to the pixel area to expose the anode layer. However, in order to facilitate the preparation of the subsequent film layer, the barrier layer is preferentially used in step S20 to remove the anode. layer and pixel definition layer for protection.

S30, a touch sensing layer is prepared on the side of the barrier layer away from the thin film transistor layer, the orthographic projection of the touch sensing layer in the first direction is completely covered by the orthographic projection of the wiring area in the first direction, The first direction is a direction perpendicular to the surface of the substrate; specifically, the touch sensing layer at least includes a signal transmission line, a first insulating layer and a touch signal line sequentially arranged on the OLED layer, and the signal transmission line at least includes The first pattern wiring is used for connection with the cathode layer.

S40, etch away the barrier layers corresponding to all the pixel regions, and prepare a light-emitting layer and a cathode layer in turn on the side of the anode layer in all the pixel regions away from the thin film transistor layer, so that all the cathodes The layer is communicated with the first pattern wiring; specifically, the cathode layer can use the patterning technology during evaporation, so that the TSP film layer is not shielded, and simultaneously realize the different light-emitting units through the cathode lap line reserved by the signal transmission line. The cathode is connected to achieve the purpose of unified control.

In some embodiments, the touch signal lines form a plurality of touch click areas arranged in an array, and each touch electrode area includes one or more adjacent pixel areas, corresponding to the preparation of the touch sensing layer. , it is also necessary to prepare a signal transmission line with a second pattern line, and there is no overlapping line between the second pattern line and the first pattern line, and the second pattern line is also not connected with the cathode layer of any light-emitting unit; The position where the second pattern traces are set is the bridge area between two adjacent touch electrode areas in the same column. During the preparation of the first insulating layer, it also needs to be in the adjacent two touch electrode areas. A bridging hole is opened in the area corresponding to the second pattern trace on the first insulating layer, so that the touch signal line is connected to the second graphic trace based on the bridge hole in the subsequent preparation of the touch signal line, so as to realize adjacent rows in the same row. connection between the touch electrode areas.

In some embodiments, when preparing the touch sensing layer, a second insulating layer should also be prepared on the side of the touch signal line away from the first insulating layer, and the etching degree of the material of the second insulating layer should be reduced at a preset position so that the It forms a support structure on the surface to realize the support function of the mask plate. Specifically, the distance between adjacent preset positions is greater than or equal to the preset distance, and the preset distance may be determined according to the actual situation.

In actual implementation, a flat layer and an encapsulation protection layer are also prepared on the side of the touch sensing layer away from the OLED layer, so as to realize the flat treatment and encapsulation protection of the surface of the display module.

It should be noted that in the preparation process of the TSP-related layers in this embodiment, the preparation materials and preparation processes used in the preparation can directly use the materials and processes of the prior art, and the thicknesses corresponding to each layer are also Conventional thickness settings can be used directly, as long as the lines that overlap with the cathode are reserved when the first pattern traces are made, and the jumpers of the touch signal lines are implemented in the bridging area.

In this embodiment, by adjusting the film layer structure of the display module, the position of the touch sensing layer is adjusted downward to the substrate side, and the first pattern trace formed by the transmission signal line in the touch sensing layer is used as the OLED to emit light. The signal input wiring of the unit cathode reduces the overall thickness of the display module and saves the product cost; and in the preparation process, the preparation process of the touch sensing layer is carried out before the preparation of the light-emitting material of the light-emitting unit, and then in the preparation process The film performance of the touch sensing layer is improved in the middle, so that the quality of the display module can be improved without changing the preparation materials and process.

A third embodiment of the present disclosure provides an electronic device, which may be a device with a display function, such as a mobile phone, a TV, a computer, etc. The electronic device includes at least the display module provided in the first embodiment of the present disclosure, thereby realizing The overall thickness of the electronic device is reduced, and the film performance of the touch sensing layer in the display module is improved, so that the quality of the display module can be improved under the condition that the preparation materials and processes remain unchanged. good user experience.

The various embodiments of the present disclosure have been described in detail above, but the present disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications on the basis of the concept of the present disclosure. These variations and modifications All should fall within the scope of the claimed protection of the present disclosure.

Claims (11)

1. A display module, comprising:

the display device comprises a substrate and a display panel, wherein the substrate comprises a plurality of pixel areas arranged in an array and a wiring area used for dividing the pixel areas;

the thin film transistor layer is arranged on the surface of one side of the substrate;

the OLED layer is arranged on one side, far away from the substrate, of the thin film transistor layer and comprises light-emitting units which correspond to the pixel regions one by one;

the touch sensing layer is arranged on one side, far away from the thin film transistor layer, of the OLED layer, the orthographic projection of the touch sensing layer in a first direction is completely covered by the orthographic projection of the wiring area in the first direction, and the first direction is perpendicular to the surface of the substrate;

the touch sensing layer at least comprises a signal transmission line, a first insulating layer and a touch signal line which are sequentially arranged on the OLED layer;

the signal transmission line at least comprises a first graph routing line, and the first graph routing line is communicated with the cathodes of all the light-emitting units.

2. The display module of claim 1, wherein the touch signal line comprises a plurality of touch electrode regions arranged in an array, and each touch electrode region comprises one or more adjacent pixel regions.

3. The display module according to claim 2, wherein the signal transmission line further comprises a second graphic trace, the second graphic trace does not have a coincident trace with the first graphic trace, and the second graphic trace is not connected to the cathode of any of the light emitting units;

and a bridging hole is formed in an area corresponding to the first insulating layer and the second pattern wire, and the touch signal line between two adjacent touch electrode areas in the same row is connected with the second pattern wire based on the bridging hole so as to realize signal transmission between the adjacent touch electrode areas.

4. The display module according to claim 1, wherein the touch sensing layer further comprises a second insulating layer disposed on a side of the touch signal line away from the first insulating layer.

5. The display module according to claim 4, wherein a support structure is disposed at a predetermined position on a side surface of the second insulating layer away from the touch signal line, and a distance between adjacent predetermined positions is greater than or equal to a predetermined distance.

6. The display module according to any one of claims 1 to 5, further comprising:

the flat layer and the packaging protection layer are arranged on one side, far away from the OLED layer, of the touch sensing layer.

7. A preparation method of a display module, which is used for preparing the display module according to any one of claims 1 to 6, and is characterized in that the preparation method is realized based on the following steps:

preparing a thin film transistor layer on the surface of a substrate, wherein the substrate comprises a plurality of pixel regions arranged in an array manner and a wiring region for dividing the pixel regions;

preparing an anode layer, a pixel defining layer and a blocking layer of each light-emitting unit in an OLED layer on one side of the thin film transistor layer away from the substrate, wherein the light-emitting units correspond to the pixel regions one to one, and openings are formed in positions, corresponding to the pixel regions, of the pixel defining layer;

preparing a touch sensing layer on one side, far away from the thin film transistor layer, of the blocking layer, wherein the orthographic projection of the touch sensing layer in a first direction is completely covered by the orthographic projection of the wiring area in the first direction, and the first direction is perpendicular to the surface of the substrate;

etching the blocking layers corresponding to all the pixel regions, and sequentially preparing a light-emitting layer and a cathode layer on one side, far away from the thin film transistor layer, of the anode layer in all the pixel regions, so that all the cathode layers are communicated with the first graph routing line.

8. The method according to claim 7, wherein the touch signal line comprises a plurality of touch electrode regions arranged in an array, each touch electrode region comprising one or more adjacent pixel regions;

the preparing of the touch sensing layer on the side of the pixel definition layer far away from the thin film transistor layer includes:

preparing the signal transmission line with a second graphic trace, wherein the second graphic trace does not have a superposed trace with the first graphic trace, and the second graphic trace is not communicated with the cathode of any one of the light-emitting units;

and arranging a bridging hole in an area corresponding to the first insulating layer and the second graphic trace, so that the touch signal line between two adjacent touch electrode areas in the same row is connected with the second graphic trace based on the bridging hole.

9. The method according to claim 7, wherein the step of forming a touch sensing layer on a side of the pixel definition layer away from the thin-film transistor layer comprises:

preparing a second insulating layer on one side of the touch signal line, which is far away from the first insulating layer, arranging a supporting structure at a preset position on the surface of one side, which is far away from the touch signal line, of the second insulating layer, wherein the distance between the adjacent preset positions is larger than or equal to the preset distance.

10. The production method according to any one of claims 7 to 9, characterized by further comprising:

and preparing a flat layer and a packaging protective layer on one side of the touch sensing layer far away from the OLED layer.

11. An electronic device, characterized by comprising at least the display module according to any one of claims 1 to 6.

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